Timeline for Measuring the phase difference between two signals
Current License: CC BY-SA 3.0
6 events
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| Nov 3, 2020 at 9:59 | comment | added | D.A.S. | @seamus It depends on your specs for frequency error % between VCO out and f input and choice of BW of LPF to permit capture. The 9046 has improved VCO error of 10%. Choose Type II for any frequency error within range of VCO as this is phase and frequency detector but more jitter since it uses edge detectors rather than type I state or binary level XOR mixer. This inherently a frequency doubler,just like a diode bridge. | |
| Nov 3, 2020 at 6:50 | comment | added | Seamus | Good idea. The pinout of the 4046 lends itself to opening the feedback loop from the PC to the VCO, leaving the PC output to provide a measure of the phase shift. 3 PCs to choose from - which provides flexibility - but which one? TI seems to be the only mfr still producing this part, but one needs to be aware that there are still spec sheets floating around for the older CD4046 parts. There are substantial diffs between these parts and the newer HC4046 parts. There's also a new-ish 9046 from Philips/Nexperia. | |
| Jul 10, 2012 at 10:16 | vote | accept | alqubaisi | ||
| Jul 10, 2012 at 6:47 | history | edited | D.A.S. | CC BY-SA 3.0 |
added 44 characters in body
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| Jul 10, 2012 at 6:28 | history | edited | D.A.S. | CC BY-SA 3.0 |
clarification
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| Jul 10, 2012 at 6:23 | history | answered | D.A.S. | CC BY-SA 3.0 |